We have uncovered a thin layer of magnetic grains and microspherules, carbon spherules, and
glass-like carbon at nine sites across North America, a site in Belgium, and throughout the rims of 16 Carolina Bays. It is ...

We have discovered what appear to be micrometeorites imbedded in seven late Pleistocene Alaskan
mammoth tusks and a Siberian bison skull. The micrometeorites apparently shattered on impact
leaving 2 to 5 mm hemispherical ...